Reduced-Graphene-Oxide with Traces of Iridium or Gold as Active Support for Pt Catalyst at Low Loading during Oxygen Electroreduction

P. J. Kulesza; B. Dembinska; S. Zoladek; I. A. Rutkowska; K. Miecznikowski; E. Negro; V. Di Noto

Reduced-Graphene-Oxide with Traces of Iridium or Gold as Active Support for Pt Catalyst at Low Loading during Oxygen Electroreduction

Chemical Physics 2018-05-23 v1

Authors: P. J. Kulesza , B. Dembinska , S. Zoladek , I. A. Rutkowska , K. Miecznikowski , E. Negro , V. Di Noto

Abstract

Chemically-reduced graphene-oxide-supported gold or iridium nanoparticles are considered here as active carriers for dispersed platinum with an ultimate goal of producing improved catalysts for electroreduction of oxygen in acid medium. Comparison is made to the analogous systems not utilizing reduced graphene oxide. High electrocatalytic activity of platinum (loading up to 30 {\mu}g cm-2) dispersed over the reduced-graphene oxide-supported Au (up to 30 {\mu}g cm-2) or Ir (up to 1.5 {\mu}g cm-2) nanoparticles toward reduction of oxygen has been demonstrated using cyclic and rotating ring-disk electrode (RRDE) voltammetric experiments. Among important issues are possible activating interactions between gold and the support, as well as presence of structural defects existing on poorly organized graphitic structure of reduced graphene oxide. The RRDE data are consistent with decreased formation of hydrogen peroxide.

Keywords

reduced graphene oxide platinum catalyst oxygen electroreduction gold nanoparticles iridium nanoparticles rrde

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@article{arxiv.1805.03147,
  title  = {Reduced-Graphene-Oxide with Traces of Iridium or Gold as Active Support for Pt Catalyst at Low Loading during Oxygen Electroreduction},
  author = {P. J. Kulesza and B. Dembinska and S. Zoladek and I. A. Rutkowska and K. Miecznikowski and E. Negro and V. Di Noto},
  journal= {arXiv preprint arXiv:1805.03147},
  year   = {2018}
}

Reduced-Graphene-Oxide with Traces of Iridium or Gold as Active Support for Pt Catalyst at Low Loading during Oxygen Electroreduction

Abstract

Keywords

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